When you flush the toilet the water in the bowl (not the tank) doesn't go all the way down

My toilet does this once in a while, normally after a major (you know). For me, its always something stopped up in the toilet, but not a hard block, just slowing it down, preventing the toilet from creating the siphoning effect when you flush.

Plunge it real good for a while and see if that remedies it. Sometimes you have to get downright aggressive. But that also depends on the toilet.

Ive also been told that a stopped up vent line for you drain can cause symptoms of this, but I have never had that be my problem, so maybe someone here has and can explain more.

When you flush the toilet the water in the bowl (not the tank) doesn't go all the way down

I have one that most repair plumbers miss.. Look down at the bottom of the bowl. If there is a small hole, then that is a jet that starts the syphon action. If it's clogged the water will just swirl around and slowly go down leaving solids behind. Take your finger,(UGH! ) and run it around the inside of the opening. Over the years minerals build up and cut down on the syphon (flush) action. If it is rough or you feel build up, take a table knife and put a bend in it to get around the curve in the bowl and chip and scrap it clear. Next take a coathanger and clear out the holes around the rim. They start the swirling action. And last, check the water level in the tank. It should be 1/2" below the top of the over flow tube. And speaking of the overflow tube, Make sure the small 1/8" tube from the ballcock to the white overflow tube is connected so it discharges in it and that it's flowing when the ballcock fills. This is what raises the water level in the bowl. For a good solid flush they all have to work together. Hope this helps . Tom